EP0260954A2
Expired / Lapsed
EP
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Solid state image pickup apparatus
Assignee: Canon Inc
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Filing: 1987-09-16
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Granted: —
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Expires: 2007-09-16
Abstract
Abstract A solid state image pickup apparatus having a selector for selecting a plurality of sensor outputs through predetermined circuits includes a difference processing circuit for calculating a difference between a selected sensor signal and a reference signal selected through the same predetermined circuit as that of the selected sensor signal. The difference processing circuit includes a first holding circuit for holding the sensor signal, a second holding circuit for holding the selected reference signal, and a circuit for receiving the output signals from the first and second holding circuits and outputting a signal corresponding to a difference therebetween.
Inventors
- 👤 Seiji Hashimoto
- 👤 Tsueno Suzuki
- 👤 Hayao Ohzu
- 👤 Tadanori Harada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 06:27
CPC Classifications
H; H04; H04N; H04N25/00; H04N25/60; H04N25/616; H04N25/63; H04N25/67; H04N25/70; H04N25/76; H04N25/767; H04N25/78
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
86 words
I. An image pickup apparatus including: a) a plurality of photoelectric transducer elements for converting incident light into electrical signals; b) a plurality of amplifying means for respectively amplifying electrical signals from said plurality of photoelectric transducer elements; and c) operating means having a first mode for causing said amplifying means to amplify the electrical signals from said photoelectric transducer elements and for forming a first signal, and a second mode for causing said amplifying means to amplify a reference signal and forming a second signal.
Claim 2
Independent Claim
14 words
An apparatus according to claim I, wherein said photoelectric transducer element includes a transistor.
Claim 3
Independent Claim
14 words
An apparatus according to claim I, wherein said operating means includes a differential amplifier.
Claim 4
Independent Claim
15 words
An apparatus according to claim I, wherein said opera ing means includes a clamp circuit.
Claim 5
Dependent Claim
25 words
An ap aratus according to claim I, wherein said operating means comprises holding means for holding at least one of the first and second signals.
Claim 6
Dependent Claim
13 words
An apparatus according to claim 5, wherein said holding means includes a capacitor.
Claim 7
Dependent Claim
14 words
An apparatus according to claim 5, wherein said holding means includes a sample/hold circuit.
Claim 8
Independent Claim
23 words
An apparatus according to claim I, wherein the reference signal is a part of the electrical signal output from said photoelectric transducer element.
Claim 9
Dependent Claim
97 words
An image pickup apparatus including: a) a plurality of photoelectric transducer elements for converting incident light into electrical signals; and b) operating means having a first mode for reading out as a first signal an electrical signal corresponding to light incident on said photoelectric transducer elements and a second mode for reading out as a second signal an electrical signal which does not correspond to the light incident on said photoelectric transducer elements, said operating means being adapted to perform an arithmetic operation of the first and second signals read out in the first and second modes.
Claim 10
Dependent Claim
14 words
An apparatus according to claim 9, wherein said photoelectric transducer element includes a transistor.
Claim 11
Dependent Claim
15 words
II. An apparatus according to claim 9, wherein said operating means includes a differential amplifier.
Claim 12
Dependent Claim
14 words
An apparatus according to claim 9, wherein said operating means includes a clamp circuit.
Claim 13
Dependent Claim
24 words
An apparatus according to claim 9, wherein said operating means comprises holding means for holding at least one of the first and second signals.
Claim 14
Dependent Claim
13 words
An apparatus according to claim 13, wherein said holding means includes a capacitor.
Claim 15
Dependent Claim
14 words
An apparatus according to claim 13, wherein said holding means includes a sample/hold circuit.
Claim 16
Dependent Claim
26 words
An apparatus according to claim 9, wherein read access in the second mode is performed as soon as read access in the first mode is performed.
Claim 17
Dependent Claim
102 words
An image pickup apparatus including: a) a plurality of photoelectric transducer elements for converting incident light into electrical signals; b) photoelectric transducer element control means having a first mode for reading out as a first signal an electrical signal corresponding to light incident on said photoelectric transducer elements and a second mode for reading out as a second signal an electrical signal which does not correspond to the light incident on said photoelectric transducer elements; c) storage means for independently storing the first and second signals; and d) operating means for operating the first and second signals stored in said storage means.
Claim 18
Dependent Claim
13 words
An apparatus according to claim 17, wherein said storage means includes a capacitor.
Claim 19
Dependent Claim
14 words
An apparatus according to claim 17, wherein said photoelectric transducer element includes a transistor.
Claim 20
Dependent Claim
14 words
An apparatus according to claim 17, wherein said operating means includes a differential amplifier.
Claim 21
Dependent Claim
14 words
An apparatus according to claim 17, wherein said operating means includes a clamp circuit.
Claim 22
Dependent Claim
26 words
An apparatus according to claim 17, wherein read access in the second mode is performed as soon as read access in the first mode is performed.
Claim 23
Dependent Claim
38 words
An apparatus according to claim 17, wherein said plurality of photoelectric transducer elements are arranged in a matrix form, and said photoelectric transducer element control means scans said plurality of photoelectric transducer elements in row and column directions.
Claim 24
Dependent Claim
35 words
An apparatus according to claim 23, wherein said photoelectric element control means simulteneously reads out the electrical signals of photoelectric transducer elements of a plurality of rows in each scanning cycle in the row direction.
Claim 25
Dependent Claim
25 words
An apparatus according to claim 24, wherein said photoelectric transducer element control means has a blanking period between the scanning cycles in the row direction.
Claim 26
Dependent Claim
29 words
An apparatus according to claim 25, wherein said storage means store the first and second signals of each photoelectric element of the plurality of rows within the blanking period.
Claim 27
Dependent Claim
21 words
An apparatus according to claim 26, further comprising signal lines for respectively reading out the signals stored in said storage means.
Claim 28
Dependent Claim
20 words
An apparatus according to claim 27, wherein of said signal lines, signal lines for the second signal are commonly connected.
Claim 29
Dependent Claim
53 words
Apparatus comprising an information signal source a reference signal source, signal processing means arranged to process the reference signal and the information signal in the same way, and means for combining the processed reference and information signals to produce an information signal in which noise introduced by the signal processing means is reduced.
References Cited (Backward Citations)
No citation records indexed.
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